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Alenkasestr [34]

3 years ago

10

It cost Kaylee $7.26 to send 66 text messages. How much does each text cost to send?

2 answers:

attashe74 [19]3 years ago

3 0

Answer:

0.11

Step-by-step explanation:

7.26 / 66 = 0.11

hope this helps <3

larisa86 [58]3 years ago

3 0

0.11 is the answer to your question

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0.08 was rounded to 1 significant figure. What is the lower bound?

Black_prince [1.1K]

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A 9.85 m ladder is placed against a wall. The height to the top of the ladder is 5 m more than the distance between the wall and

Dafna1 [17]

Given:

Length of the ladder = 9.85 m

The height to the top of the ladder is 5 m more than the distance between the wall and the foot of the ladder.

To find:

The height to the top and the distance between the wall and the foot of the ladder.

Solution:

let x be the distance between the wall and the foot of the ladder. Then the height to the top of the ladder is (x+5).

Pythagoras theorem: In a right angle triangle,

$Hypotenuse^2=Base^2+Perpendicular^2$

In the given situation, hypotenuse is the length of ladder, i.e., 9.85 m. The base is x m and the height is (x+5) m.

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$(9.85)^2=x^2+(x+5)^2$

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$0=2x^2+10x+25-97.0225$

$0=2x^2+10x-72.0225$

Here, $a=2, b=10,c=-72.0225$ . Using the quadratic formula, we get

$x=\dfrac{-b\pm \sqrt{b^2-4ac}}{2a}$

$x=\dfrac{-10\pm \sqrt{(10)^2-4(2)(-72.0225)}}{2(2)}$

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Approximating the value, we get

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Distance cannot be negative so $x\neq -9.$

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$x+5=9$

Therefore, the base is 4 m and the height is 9 m.

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4 years ago

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Tpy6a [65]

Given:

$\angle a$ and $\angle b$ are complementary angles.

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